Mallorca is the largest of Spain's Balearic Islands and one of Europe's most reliable summer-holiday destinations. The island combines a long, dry summer with a soft Mediterranean shoulder season, dramatic limestone mountains in the northwest, sheltered coves in the south, and a capital — Palma — that wears its Gothic cathedral and sandstone old town with quiet confidence. Visitors come for beach time, but the island rewards anyone willing to drive thirty minutes inland into the Tramuntana range.
May, June and September are the sweet spot: warm sea, full sunshine, and noticeably fewer crowds than July or August. April and October still deliver mild weather for hiking and cycling but the Mediterranean is too cool for long swims.
December through February is mild rather than cold, with daytime temperatures around 15°C and the occasional dramatic storm rolling off the Tramuntana. The almond blossom in late January and early February is one of the island's quiet spectacles. Swimming is off the table; long walks, citrus harvests and empty restaurants are the trade.
From March the days lengthen quickly. By April daytime highs reach the high teens and the wildflowers in the Serra de Tramuntana peak. May is the first month most travellers find genuinely warm, with sea temperatures climbing past 18°C and the first real beach days arriving.
June, July and August deliver the postcard: 28-32°C highs, almost no rain, sea temperatures between 24 and 26°C, and twelve-plus hours of daylight. July and August are also the busiest weeks of the year — book accommodation months ahead and expect traffic on the coastal roads. Inland villages stay bearable thanks to the elevation.
September is widely considered the best single month: water still warm from the long summer, air temperatures backing off into the high twenties, and the school-holiday peak gone. October cools steadily but stays sunny; by November the rains return and the season effectively ends.
Daytime highs of 31-33°C are common, but the dry air and sea breeze make it more comfortable than the same temperature in continental Europe. Water is at its warmest, around 26°C. If heat-sensitive, plan beach time for early morning and after 5pm.
Realistically late May. The Mediterranean warms slowly: April sea temperatures are around 15°C, May reaches 17-18°C, only from June does the water break 20°C and feel inviting for longer swims.
December and January each see roughly seven to nine rainy days, often as short heavy showers rather than full-day rain. Annual rainfall about 450mm — concentrated in autumn and winter.
For beach holidays, no. For walking, cycling, food and quiet villages, yes — temperatures stay around 17-19°C and prices drop sharply.